Whispers of the Old Gods will be the next Hearthstone expansion, Blizzard has announced.

Packs containing the 134 new cards included in the set will be available for gold, real money, or as rewards in the Arena. They will feature cards based on C’Thun, N’Zoth, Yogg-Saron, and Y’Shaarj — a.k.a the Old Gods — and their followers.

Blizzard teased at least one new mechanic, wherein cards affiliated with a certain god will power up that minion whether it's in the player's hand, on the board, or just in their deck. The card in question, C'Thun, will be a 6/6 creature for 10 mana with a battlecry that deals its attack damage "randomly split among all enemies."

Whispers of Old Gods won't launch until late April or early May of this year. When it does, however, it will bring the promised Standard Hearthstone format along with it. Those who play Standard with Whispers of the Old Gods cards will even unlock new quests for ranked matches.

At some point, those who want to buy into the new expansion will be able to do so ahead of time by pre-purchasing 50 card packs for $50. Those that do will also receive a special card back for their trouble.

If you'd prefer your cards to be free, Blizzard also teased "a special promotional period" during which any player that logs in will receive three free packs from the new set. Though they did not specify when the period ends or begins.